%0 Journal Article
%A Yu. V. Nikonorova
%T On One Extremal Problem on the~Euclidean Plane
%J Matematičeskie trudy
%D 2001
%P 111-121
%V 4
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MT_2001_4_1_a6/
%G ru
%F MT_2001_4_1_a6